/*
 * Copyright (C) 2009 M. Hautle.
 * 
 * This file is part of TrackedBean.
 * 
 * TrackedBean is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any later version.
 * 
 * TrackedBean is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License along with TrackedBean. If not, see <http://www.gnu.org/licenses/>.
 */
package ch.trackedbean.binding.guicomponents.renderers;

import java.awt.*;
import javax.swing.*;
import ch.trackedbean.binding.mapping.*;
import ch.trackedbean.util.*;

/**
 * Cell renderer using {@link ELExpression} to extract a {@link String} out of a given bean.
 * 
 * @author M. Hautle
 */
public class SimpleELTableCellRenderer extends DefaultPropertyCellRenderer {
	/** The expression */
	private final ELExpression expression;

	/**
	 * Default constructor.
	 * 
	 * @param el An string containing el expression escaped in <code>${el}</code> blocks
	 * @param undefined The string to use for undefined values
	 * @param mapping The tablemapping owning this renderer
	 * @param showStatus True if the background should be adapted according to the cell state
	 */
	public SimpleELTableCellRenderer(String el, String undefined, TableMapping mapping, boolean showStatus) {
		super(mapping, showStatus);
		expression = new ELExpression(el, undefined);
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
		if (value != null)
			value = expression.evaluate(value);
		return super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
	}
}
